The fourth instalment of the show will be the last for the current cast - including Olivia Colman as the Queen, Tobias Menzies as Prince Philip and Helena Bonham Carter as Princess Margaret.
But Season 4 will also see the introduction of two other central characters, Princess Diana (played by Emma Corrin) and Margaret Thatcher (Gillian Anderson).
The fourth season picks up in the late 1970s and will depict much of Prince Charles and Princess Diana's romance.
As Netflix explains: "Charles' romance with a young Lady Diana Spencer provides a much-needed fairytale to unite the British people, behind closed doors, the Royal family is becoming increasingly divided."
It will also cover Charles and Diana's wedding at St Paul's Cathedral. Last month, Emma shared a first look at the royal's iconic wedding dress.
Posting two images on Instagram, Emma wrote: "Tick tock tick tock 15.11.20."
The first snap sees Emma in the beautiful replica gown, while the second shows the actress filming alongside Prince Charles actor Josh O'Connor.
Over on The Crown's Twitter page, creators also shared the image, writing: "A first glimpse of Princess Diana's wedding dress.
"Emmy award-winning costume designer Amy Roberts wanted to capture the same spirit and style of David & Elizabeth Emanuel's original design, without creating a replica for Emma Corrin."
The fourth season also introduces fans to Gillian Anderson's portrayal of Margaret Thatcher.
In the trailer alone, frosty tensions can be seen arising between the prime minister and the Queen, which as Netflix explains "only grows worse as Thatcher leads the country into the Falklands War, generating conflict within the Commonwealth."
Season 4 will consist of 10 hour-long episodes and we'll be disappointed if we're not able to binge our way through them in one day.
But fans of the show will pleased to hear that earlier this year, Netflix confirmed there will be a total of six seasons instead of five, as previously thought.
Bring on Sunday!
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